Collections heirarchy

[Glenny Dsilva]

I am creating a program to store Categories and SubCategories

like main category is having subcategories and each subcategory can have subcategories like a heirarchy.

Main Category1
| |
Sub Category1 Sub Category 2
|
Sub Category 1a

I want to store this heirarchy structure in a collection can anybody explain which type of collection to use and how will i retrieve the collection.

[dinesh Venkatesan]

Hi,

With my understanding about your problem statement i suggest you can use HashMaps where a Key,Value pair could be <MainCategory,SubCategory> Where the SubCategory is of type HashMap. That means you will result in something like this.

<MainCategory,<SubCategory,SubCategory1>>

like this. Still not clear. Take a look at this snippet.

   Map categoryMap = new HashMap();
         Map subCategoryMap = new HashMap();
         subCategoryMap.put("SubCategory","SubCategory1a");
         categoryMap.put("MainCateg",subCategoryMap);